Industrial power modules and military modules, the biggest difference lies in the operating temperature, the operating temperature is divided into the ambient temperature and component temperature, the component temperature, the industry consensus is that the highest can only reach 125 degrees Celsius; and the ambient temperature is more reasonable label should be -40 to +85 degrees Celsius (of course, not all power manufacturers can do this, but the top power suppliers can do). .

Power supplies should be divided into the following classes according to the object and occasion of use:

Aerospace grade: (AA, inerpoint, etc.) according to the radiation resistance should also be divided into several grades, anti-irradiation level of 25kRad and 100kRad points. Aerospace applications are also divided into manned space and unmanned space, the standard power supply for aerospace-grade applications operating temperature is -55 ~ +125 degrees, starting from 125 degrees derating to 135 degrees output is 0. This refers to the operating temperature are referred to the shell temperature - Tcase! Non-standard products, such as MDI power supply, can extend its derating curve, starting from 125 degrees linear derating, to 200 degrees output for 0. 

Aviation grade (AA, interpoint, VPT, GAIA, VICOR, etc., domestic 43, 24, etc.) 

Military grade (interpoint, VPT, GAIA, VICOR, etc., domestic 43, 24, etc.) 

Quasi-military grade (GAIA, VICOR, etc., there are many other brands please know the supplement) Internationally known as "COST", most of the boast for the military products of the company belongs to this category. 

International industrial-grade (at present, we know the most such as lambda, COSEL, C & D, ERICSSON, POWER-ONE and other communication power supply manufacturers, Taiwan's part of the high-end power supply manufacturers such as TELDA, PDUKE, CINCON (CINCON), etc., the mainland has a lot of, mainly concentrated in Beijing, Shenzhen, etc.; which do a better job of the new Raynen, Jin Sheng Yang, etc.) operating temperature is generally -40 to 40 degrees, the operating temperature is generally -40 to 40 degrees. (The working temperature is generally in the -40 - 85)

Industrial grade (low-end market, domestic dominant) operating temperature -20-55 

Civilian (commercial) grade (low-end market, IC accounted for the mainstream) operating temperature -0-55 

Consumer grade (low-end market, IC accounted for the mainstream) operating temperature 0-55